Improvement in calendar-watches



B. BAILLOT. Calendar Watch.

No. 212,882. Patemed Mar. 4; 1819.

u, PTERS. PHOTGLIYHOGRAPNER WAS C.

UNITED STATES PATENT OFFICE.

BARBEZAT BAILLOT, OF LOGLE, SVVITZERLAND.

IMPROVEMENT lN CALENDAR-WATCHES.

Specification forming part of Letters Patent No. 212,882, dated March 4,1879; application filed December 4, 1878.

To all whom it may concern:

Be it known that I, Brlnnnza'r BnrLLor, of Locle, in the Canton ofNeufehatel and Republic of Switzerland, have invented a new and usefulImprovement in lVatches; and I hereby declare that the following' is aclear and exact description of the same, reference being had to theacconpanying drawings, forming a part of this specification.

The object of my invention is to provide for certain improvements inwatches, by aid of which a watch will record the days of tle month andthe days of the week by aid of cei'- tain meclanical devices, whichderive their motion from the watch-movement.

My invention consists in attaching on the center pinion of a watch underthe dial a wheel provided with thirty (30) teeth or cogs. This wheelgears into another wheel having sixty ((30) teeth. This last wheel isprovided with two pins, one fastened to the under side ofthe rim and theother to the npper side of the same. One of these pins is intended tomove a wheel for recording the days of the week. The other pin isintended to move a wheel for recording the days of the month. Above thewheel for recordin g the days of the month is a spring' pusher or pawl,which is acted upon bya slide. This slide is moved by aid of a pin,which protrudes through the rim of the watch-case. The object of thisspring pusher or pawl is to turn the wheelindependently of the watchmechanism, in order to register correctly the nninber of days indifferent months.

In order to more fully describe my invention, I refer to theaccompanying drawings, forming a part of this specifcation.

Figure l is a front view of the internal mechanism of awatch embodyin gmy invention. Fig. 2 is a front view of a watch-dial emhodying myinvention.

A is a watch-case; B, the central pinion, to which is attached thecogged wheel O, with thirty teeth. This wheel gears into the wheel D,having sixty teeth, and attached to the axle d. dl is a pin, fastened tothe under side ofthe wheel D. dz is another pin, fast ened to the upperside of the wheel D. The object ofthe pin d2 is to turn the star-wheelJ, provided with seven teeth, indicating the seven days of the week.This wheel is attacled to the axle c, which protrudes through the dialG, and provided at the end with a hand, g. The space h, over which thehand g revolves, is divided off into seven spacesviz., Sunday, Monday,Tuesday, fednesday, Thursday, Friday, and Saturday.

The object of the pin d1 is to turn the wheel I, provided withthirty-one teeth, and attached to the axle 'i. Tlese thirtyone teethindicate the number of days in a full month. To the axle i, wlichprotrudes through the dia-l G, is fastened the hand 15', revolving overthe monthdial g', with thirty-one numbers, as shown.

It is obvious that when the wheel C revolves twice, thus indicatingtwenty-four hours or one day, the wheel D will revolve once in the sametime, or once a day. At each revolution of the wheel D the wheels J andI will have moved through the actions of the pins di and d2 one tooth,thus changing the days ofthe week and the days of the 'month. This willtake place when the hour-hand reaches twelve olclock midnight, and willcontinue to take place as long as the watch mechanism is in runningorder.

m is a spring pawl or starter, fastened to the watch-case at ml abovethe wheel I, as slown. This pawl is provided with a tooth, me, which isprevented from engaging into the wheel by virtue of the spring' on theend ofthe pawl. The office of this pawl m is to cause the wheel I torevolve independcntly of the watch mechanism. This is done by pushingthe pawl down and causing the tooth mz to strike against the teeth ofthe wheel l, thus moving the said wheel one tooth by each movement ofthe pawl. This pawl is operated from the outside of the case by the pina, which also acts upon a slide, n', acting upon the outer end ofthepawl.

B y the above arrangement the diificulty of registering correctly thedifferent number of days in certain months is overcome.

'When February is reached it is required that the teeth of wheel I shallskip three days, so as to correspond with the days-oftheweek dial; andin order to accomplish this it is only required to press down the pin athree times, which will cause the wheel I to move around the distancethree teeth, which is done through the action of the pawl. The samecourse is pursued with months having thirty days, excepting the pin isonly pressed down once.

Having thus described my invention, I desire to claim- 1. The wheel D,withV pins d1 and d2, and provided with sixty teeth, in combination withthe wheel C, with thirty teeth, and attached to the central pinion, B,substantially as and for the purpose set forth.

2. The wheel D, with pins d1 and d2, and being provided with sixtyteeth, in combination with the wheel. J,.with seven teeth, and attachedto the axle iwith hand i', substantially as and for the purposes setforth.

3. The Wheel I, having thirty-one teeth, in combination with the pawl m,with tooth mz, slide n', and pin n, substantially as and for the purposeset forth. v

This speeification signed this 15th day of September, 1878.

' BARBEZAT BAILLOT. Witnesses:

EUGENE Lozn OoURVoIsmR, G. MATILE.

